ANATOMY

Detailed explanation-1: -The main function of your pineal gland is to receive information about the daily light-dark (day-night) cycle from the retinas in your eyes and then produce and release (secrete) melatonin accordingly-elevated levels at night (during dark hours) and low levels during the day (during light hours).

Detailed explanation-2: -The main function of the pineal gland is to receive information about the state of the light-dark cycle from the environment and convey this information by the production and secretion of the hormone melatonin.

Detailed explanation-3: -Your pineal gland secretes the highest levels of melatonin during the night and minimal amounts during the day.

Detailed explanation-4: -The pineal gland is a very small gland in the centre of the brain shaped like a pine cone, which is where it gets its name. It is part of the endocrine system. It produces a hormone called melatonin.

Detailed explanation-5: -Melatonin is a hormone that your brain produces in response to darkness. It helps with the timing of your circadian rhythms (24-hour internal clock) and with sleep. Being exposed to light at night can block melatonin production.